When you click "Solve," the software counts the generated mesh entities. If the total count exceeds these thresholds, the solver locks and displays the size limit error. How to Check Your Current Model Size
Generally capped at 512,000 nodes/cells , though some newer versions (like 2025 R1) may allow up to 1 million cells .
Here is a useful guide on how to interpret, troubleshoot, and resolve this error.
If you exceed these numbers, the solve will fail, and the message will change from "verified" to a "limit exceeded" error. 3. How to Manage Model Size When you click "Solve," the software counts the
If you see the “verified” warning, your license type has a .
Ansys Academic and Student versions have built-in constraints to ensure the software is used for educational purposes rather than heavy industrial work. Ansys Student (Introductory): Typically limited to 32,000 nodes/elements for Structural (Mechanical) simulations and 512,000 cells/nodes for Fluid Dynamics (Fluent). Newer versions may allow up to for structural or nearly for CFD, but these vary by release. University Licenses: Limits vary by tier, such as for Intermediate, for Advanced, and for Research licenses.
Change the Element Order from Quadratic to Linear . This reduces the number of mid-side nodes, drastically lowering the total node count. 5. Reset the Solver Cell (If Limit was Previously Exceeded) Here is a useful guide on how to
If you are a simulation engineer, you have likely encountered the dreaded pop-up or output message while solving a model in Ansys Fluent, Mechanical, or HFSS: “Your product license has numerical problem size limits verified” or a variation such as “License limits restrict the maximum problem size (number of nodes/cells).”
Ansys student or academic edition licenses impose strict constraints on the geometry complexity and mesh density you can simulate. Encountering the message "Your product license has numerical problem size limits verified" means your current simulation model exceeds the node, element, or body counts permitted by your specific software license level.
The error message is a verification that your model exceeds the maximum node or element count allowed by your specific Ansys license. This is most common in free Student or restricted Academic versions. Understanding License Limits (2025/2026 Standards) The limits depend on the physics of your simulation: How to Manage Model Size If you see
Limits vary by release; many current student versions allow ~512k cells. Electronics (HFSS/Maxwell) 64k (3D), 8k (Surface)
Limits can vary from 16k to 512k nodes depending on whether the license is "Introductory," "Intermediate," or "Research". Why It Might Fail Even If Your Count Is Low
You are attempting to run a simulation (likely a "pre-post" or "solver" task) that exceeds the size limit of your current license tier. Common Cause: Using a "Pre-Post" license to solve a large model, or having an older license file that doesn't recognize your current Ansys version limits. Immediate Fix: Check if you are using the correct license module (e.g., switching from "Pre-Post" to a full "Solver" license) or update your license file.
Contact your ANSYS reseller to request a license feature upgrade (e.g., HPC Pack, larger problem size caps, or unlimited nodes).
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